[Iaude] MPEC P102: 2018 PH21 [a=1.90,e=0.65,i=1.8,H=24.1]

[mpec at mpcdb1.cfa.harvard.edu]

M.P.E.C. 2018-P102                               Issued 2018 Aug. 14, 18:00 UT
 
     The Minor Planet Electronic Circulars contain information on unusual
         minor planets and routine data on comets.  They are published
    on behalf of Division F of the International Astronomical Union by the
          Minor Planet Center, Smithsonian Astrophysical Observatory,
                          Cambridge, MA 02138, U.S.A.

             Prepared using the Tamkin Foundation Computer Network

                              MPC at CFA.HARVARD.EDU
            URL https://www.minorplanetcenter.net/    ISSN 1523-6714


                                   2018 PH21
 
Observations:
     K18P21H* C2018 08 11.41621 20 31 07.838-09 50 43.80         21.9 wUEP102F51
     K18P21H  C2018 08 11.42793 20 31 04.537-09 50 43.25         21.9 wUEP102F51
     K18P21H  C2018 08 11.43963 20 31 01.239-09 50 43.15         21.7 wUEP102F51
     K18P21H KC2018 08 12.16234620 27 44.99 -09 50 45.8          21.7 VuEP102H21
     K18P21H KC2018 08 12.17493920 27 41.25 -09 50 45.4          21.3 VuEP102H21
     K18P21H KC2018 08 12.18590320 27 37.99 -09 50 45.6          22.1 VuEP102H21
     K18P21H _C2018 08 12.26042420 27 18.772-09 50 29.41         21.4 GVEP102568
     K18P21H _C2018 08 12.26137020 27 18.482-09 50 29.40         21.1 GVEP102568
     K18P21H _C2018 08 12.26231520 27 18.197-09 50 29.42         21.0 GVEP102568
     K18P21H |C2018 08 14.08309 20 17 49.50 -09 49 08.6          21.4 VUEP102807
     K18P21H |C2018 08 14.08893 20 17 47.39 -09 49 08.8          21.4 VUEP102807
     K18P21H |C2018 08 14.09593 20 17 44.91 -09 49 09.1          21.3 VUEP102807
     K18P21H KC2018 08 14.34767 20 16 15.39 -09 49 52.6          21.7 RoEP102291
     K18P21H KC2018 08 14.34984 20 16 14.63 -09 49 52.7          21.9 RoEP102291
     K18P21H KC2018 08 14.35207 20 16 13.82 -09 49 52.7          21.5 RoEP102291
 
Observer details:
291 LPL/Spacewatch II.  Observer R. A. Mastaler.  1.8-m f/2.7 reflector + CCD.
568 Mauna Kea.  Observers R. J. Wainscoat, L. Wells.  Measurers M. Micheli,
    R. J. Wainscoat.  3.6-m Canada-France-Hawaii Telescope + CCD.
807 Cerro Tololo.  Observers T. Linder, R. Holmes.  0.61-m f/6.5 astrograph
    + CCD.
F51 Pan-STARRS 1, Haleakala.  Observers J. Bulger, T. Lowe, A. Schultz,
    M. Willman.  Measurers K. Chambers, S. Chastel, L. Denneau, H. Flewelling,
    M. Huber, E. Magnier, Y. Ramanjooloo, R. Wainscoat, C. Waters, R. Weryk.
    1.8-m Ritchey-Chretien + CCD.
H21 Astronomical Research Observatory, Westfield.  Observer R. Holmes.
    Measurers S. Foglia, L. Buzzi, T. Linder, R. Holmes.  0.81-m f/4.0
    astrograph + CCD.
 
Orbital elements:
2018 PH21                                                Earth MOID = 0.0187 AU
Epoch 2018 Mar. 23.0 TT = JDT 2458200.5                 MPC
M 282.15370              (2000.0)            P               Q
n   0.37549690     Peri.  226.24045     +0.58194791     -0.81321388
a   1.9028234      Node   188.17543     +0.75482310     +0.54218287
e   0.6510339      Incl.    1.79340     +0.30261974     +0.21147322
P   2.62           H   24.1           G   0.15           U   7
Residuals in seconds of arc
180811 F51  0.1-  0.1-    180812 H21  0.1-  0.3-    180814 807  0.3-  0.1-
180811 F51  0.0   0.2+    180812 568  0.4+  0.1-    180814 807  0.2+  0.5-
180811 F51  0.1+  0.0     180812 568  0.3+  0.1-    180814 291  0.3-  0.3+
180812 H21  0.5-  0.3-    180812 568  0.2+  0.1-    180814 291  0.2+  0.1+
180812 H21  0.3-  0.0     180814 807  0.1-  0.2+    180814 291  0.3+  0.1-

Ephemeris:
2018 PH21                a,e,i = 1.90, 0.65, 2                   q = 0.6640
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase     V
2018 07 15    21 18 20.5 -10 34 20   0.5017  1.4815   153.1    18.1    24.4
...
2018 07 30    21 04 55.8 -09 58 53   0.3200  1.3306   168.8     8.5    22.8
...
2018 08 07    20 47 13.2 -09 51 37   0.2351  1.2474   171.8     6.7    21.9
...
2018 08 13    20 23 38.2 -09 49 55   0.1771  1.1839   163.2    14.4    21.5
2018 08 14    20 18 16.7 -09 49 30   0.1680  1.1733   161.1    16.2    21.4
2018 08 15    20 12 21.6 -09 48 52   0.1590  1.1626   158.8    18.3    21.4
...
2018 08 21    19 19 04.2 -09 30 22   0.1095  1.0985   140.6    35.8    21.0
...
2018 08 29    16 27 58.6 -05 29 06   0.06810 1.0131    90.7    85.4    21.3
...
2018 09 13    11 37 24.8 +06 05 01   0.1475  0.8593     4.2   175.1

A. U. Tomatic                (C) Copyright 2018 MPC           M.P.E.C. 2018-P102